Charity boxing event turns ugly

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The Kardashian sisters are used to throwing jabs at each other on their reality show, but on Tuesday the family took that to a whole new level.

Kim Kardashian and brother Rob stepped into the ring on Tuesday in Los Angeles for the Kardashian Charity Knock Out event, where people who bid at CharityBuzz.com had the opportunity to step into the ring and spar with members of the reality family.

However, the charity event took a bit of a dramatic turn when Kim was left with a "black eye" and brother Rob was sent to the hospital with a concussion by someone who Kim claims was a "trained fighter."

"The event itself was absolutely insane!!," Kim posted on her blog on Wednesday. "We literally had three days of training to prepare for the event and thought it would be a little bit of fun to raise money for one of our favorite charities, The Dream Foundation. We didn't expect what happened."

Kim donned a pair of pink gloves and pink shorts as she hopped into the ring and eventually lost to her opponent, leaving the reality starlet with what she called a "black eye."

But when younger brother Rob entered the ring for his fight, he met an opponent who was "35 lbs heavier than Rob and was a trained fighter! He was overheard saying that he just wanted to be on TV!!" Kim blogged. "Even though the organization had assured us that they were screening the people we were fighting against and that they would be within 5 lbs of our weights!"

In addition to being much smaller than his opponent, Rob also took some unexpected shots, according to Kim.

"At one point Rob's mask fell off and when he put his hands down he got hit in the face and ended up in hospital with a concussion," she continued. "Rob's a strong guy and can definitely hold his own, but he wasn't expecting to get hit after his mask had fallen off! This guy just got really down and dirty!"

The family was apparently so shell-shocked by what happened, that Khloe Kardashian and Kourtney's boyfriend, Scott Disick, backed out of their scheduled fights.

But Kim still honored her bout.

"I didn't want to let the charity down, so I decided to get in the ring. My girl was a good sport, but she was tough! I knew I had to do it for charity, since that's what it was all about, but man, my girl could throw a punch! Look at my black eye!!!" she posted, with a photo of her bruised eye.

But through it all, Kim said it was for a good cause.

"At the end of the day, we did this for charity and that's what counts. Rob is doing fine now and my black eye will be gone soon… I hope. You can try to bring the Kardashians down… but we're a strong family. A concussion and a black eye can't hold us down!" she wrote.